AirHint found the following cheapest return flights from London (LTN) to New York (JFK) in September 2025 (see full year).

Return flights

14 Sep - 21 Sep	Ryanair
04 Sep - 07 Sep	Ryanair
10 Sep - 30 Sep	easyJet
17 Sep - 23 Sep	easyJet
10 Sep - 17 Sep	easyJet
23 Sep - 30 Sep	easyJet
10 Sep - 16 Sep	easyJet
17 Sep - 21 Sep	easyJet
10 Sep - 23 Sep	easyJet
18 Sep - 26 Sep	easyJet
23 Sep - 01 Oct	easyJet
10 Sep - 08 Oct	easyJet
18 Sep - 01 Oct	easyJet
17 Sep - 17 Oct	easyJet
30 Sep - 05 Oct	Ryanair
24 Sep - 01 Oct	easyJet
30 Sep - 15 Oct	easyJet
03 Sep - 01 Oct	easyJet
24 Sep - 08 Oct	easyJet
19 Sep - 01 Oct	easyJet

Also check the deals for one-way flights from London to New York in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from London to New York in September from 333€

Return flights